Remove unused exposed APIs for WebRuntimeFeatures

Source/web/WebRuntimeFeatures.cpp

Index: Source/web/WebRuntimeFeatures.cpp
diff --git a/Source/web/WebRuntimeFeatures.cpp b/Source/web/WebRuntimeFeatures.cpp
index 019a9c34459e97c1604fa950fa6b26b9e4179fff..26f2c1353d749f18d4f080c35808973e72ef1508 100644
--- a/Source/web/WebRuntimeFeatures.cpp
+++ b/Source/web/WebRuntimeFeatures.cpp
@@ -67,11 +67,6 @@ void WebRuntimeFeatures::enableDatabase(bool enable)
     RuntimeEnabledFeatures::setDatabaseEnabled(enable);
 }
 
-void WebRuntimeFeatures::enableDialogElement(bool enable)
-{
-    RuntimeEnabledFeatures::setDialogElementEnabled(enable);
-}
-
 void WebRuntimeFeatures::enableEncryptedMedia(bool enable)
 {
     RuntimeEnabledFeatures::setEncryptedMediaEnabled(enable);
@@ -240,11 +235,6 @@ void WebRuntimeFeatures::enableWebMIDI(bool enable)
     return RuntimeEnabledFeatures::setWebMIDIEnabled(enable);
 }
 
-void WebRuntimeFeatures::enableHTMLImports(bool enable)
-{
-    RuntimeEnabledFeatures::setHTMLImportsEnabled(enable);
-}
-
 void WebRuntimeFeatures::enableXSLT(bool enable)
 {
     RuntimeEnabledFeatures::setXSLTEnabled(enable);
@@ -265,11 +255,6 @@ void WebRuntimeFeatures::enableSharedWorker(bool enable)
     RuntimeEnabledFeatures::setSharedWorkerEnabled(enable);
 }
 
-void WebRuntimeFeatures::enableExperimentalWebSocket(bool enable)
-{
-    RuntimeEnabledFeatures::setExperimentalWebSocketEnabled(enable);
-}
-
 void WebRuntimeFeatures::enableTargetedStyleRecalc(bool enable)
 {
     RuntimeEnabledFeatures::setTargetedStyleRecalcEnabled(enable);